And the 19-year-old continued, sharing her reaction when the reality TV starlet called her out:
[Image via Glamour Magazine.]
Katy Perry is a true blue hottie!
The singer committed to the azure theme without going overboard at the Smurfs 2 photocall in Cancun on Monday.
Looking elegant and classy in a blue lace Monique Lhuillier A-line frock, KatyKat injected some fun into the ensem with two-toned cateye sunnies, silver Giuseppe Zanotti pumps, and a blue floral headband.
She's been looking SO good all week!
[Image via Getty Images.]